Leaf-miner: An underside mine, with few creases and causing little leaf
distortion. Some mottling of the upper leaf surface may be caused
(British
leafminers).

Oval,
lower-surface tentiform mine. The lower epidermis has no recognisable
folds, and in fact the mine is barely visible in the felty underside
of the leaf. Frass heaped in an angle of the mine. Pupa in a barely
recognisable flimsy cocoon (Bladmineerders van Europa).

Larva: The larvae of moths have a head capsule and chewing mouthparts with opposable mandibles (see video of a gracillarid larva feeding), six thoracic legs and abdominal legs (see examples).

Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).